With the help of the people of Shaaloani, you break into the fortress.

How to Unlock

Vanguard, a 4-player dungeon, is unlocked by the level 97 Main Scenario Quest All Aboard.

Vanguard Commander R8

Electrowave damages all characters.

When the boss casts Enhanced Mobility, look at which direction the wingblade is pointing, and which direction (counterclockwise or clockwise) the circle marker leads out from the boss. The boss will move in the direction of the red line marker, and the blade will hit the areas on that side as it goes around.

Dispatch summons untargetable Vanguard Sentry R8s. If the boss tells them to "commence firing", they will do line attacks in a straight line in the direction that they are facing. If the boss tells them "prepare for aerial bombardment", get as far away from the Sentries as you can.

If there are four sentries along two edges of the area, they will do a grid of line attacks, so make sure not to be in front of any of them.

Electrosurge targets all characters with circle markers that follow them. Spread apart to avoid overlapping other characters with them.

If there is one Sentry in the middle of each edge, and a sentry appears in each corner afterward, look for a safe corner, then when the first set of sentries does their attacks, go into the middle where it's safe.

Protector

Electrowave damages all characters.

Search and Destroy hits the area with many line attacks and circle attacks. Keep moving out of attack markers as needed.

Fulminous Fence places electrified fences on the area. Don't walk through them or you will be afflicted with Paralysis, which can be removed with Esuna.

When the boss casts Battery Circuit, it will have a rotation marker, and a circle attack centered on itself, and rotating cone attacks. Move along with the rotation while avoiding going through the electrified fences.

Rapid Thunder is a high-damage attack on the player highest in the enmity list.

Motion Sensor hits the area with line attacks that move along the platform, while also inflicting Acceleration Bomb on all characters. Stand near an edge of a line attack that is moving away from you, but stop moving just before the Acceleration Buff status wears off. If you are moving when the effect wears off, you will be hit with an explosion.

Heavy Blast Cannon targets a random player with a line stack marker. Unmarked players should stack together in a line with the marked player to reduce the damage of the attack.

Tracking Bolt targets all characters with circle attack markers that follow them. Spread apart to avoid hitting other characters with your circle.

Zander the Snakeskinner

Electrothermia damages all characters.

Soulbane Saber places a line attack marker on the area, then covers that side of the area with flames. Go to the side of the area that the line attack was not pointing at.

Saber Rush is a high-damage attack on the player highest in the enmity list.

The boss will begin casting Soulbane Saber in multiple locations, so go to the quadrant that was not pointed at by the line attack. Then spread apart to avoid hitting the other characters with the circle attacks that follow you.

Second Phase

Syntheslean is a cone attack.

The boss will move to a side of the area and cast Syntheslither, placing a wavy line marker on the area. There will be sword icons at certain points on the line. When the boss reaches each sword mark, he will do a cone attack either to the left or right, and will alternate the direction at each sword mark.

Shade Shot is a high-damage attack on the player highest in the enmity list.

Slitherbane Foreguard will hit the area in front of the boss. Slitherbane Rearguard will hit the area behind the boss. Be sure to move accordingly before the attack goes off, but also be sure to move out of the flames that appear afterward.

Screech damages all characters.

Completing the Quest

Defeating the boss will complete one of the quest objectives for the Main Scenario Quest All Aboard.